<template>
  <!-- 整体容器 -->
  <el-container class="home-container">
    <!-- 头部区域-->
    <el-header>
      <div @click="backHome">
        <img src="../assets/logo.png"
             alt=""
             srcset="">
        <span>后台管理系统</span>
      </div>
      <el-button type="info"
                 @click="logout">退出</el-button>
    </el-header>
    <!--页面主体区域 -->
    <el-container>

      <!-- 侧边栏区域-->
      <el-aside :width="isCollapse ? '64px' : '200px'">
        <div class="toggle_button"
             @click="togglecollapse">|||</div>
        <!--  侧边栏菜单区域-->
        <!-- default-active  默认高亮列表选项-->
        <el-menu :default-active="activePath"
                 class="el-menu-vertical-demo"
                 background-color="#333744"
                 text-color="#fff"
                 active-text-color="#409EFF"
                 :unique-opened="true"
                 :collapse="isCollapse"
                 :collapse-transition='false'
                 router>
          <!-- router 采用菜单跳转路由模式(main打开)-->
          <!-- 一级菜单 -->
          <!--不同的index打开不同的菜单-->
          <el-submenu :index="item.id + ' '"
                      v-for="item in menulist"
                      :key="item.id">
            <!-- 一级菜单的模板区域 -->
            <template slot="title">
              <!-- 图标 -->
              <i :class="iconsObj[item.id]"></i>
              <!-- 文本 -->
              <span>{{item.authName}}</span>
            </template>
            <!-- 二级菜单
             index 作为开启router路由的跳转地址
            -->
            <el-menu-item :index="'/' + subItem.path"
                          v-for="subItem in item.children"
                          :key="subItem.id"
                          @click="saveNavState('/' + subItem.path)">
              <template slot="title">
                <!-- 图标 -->
                <i class="el-icon-s-operation"></i>
                <!-- 文本 -->
                <span>{{subItem.authName}}</span>
              </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <!--右侧主题区域 -->
      <el-main>
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
  created () {
    this.getMenuList()
    // 得到激活地址
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  data () {
    return {
      menulist: [],
      iconsObj: {
        // eslint-disable-next-line quote-props
        '125': 'iconfont icon-user',
        // eslint-disable-next-line quote-props
        '103': 'iconfont icon-tijikongjian',
        // eslint-disable-next-line quote-props
        '101': 'iconfont icon-shangpin',
        // eslint-disable-next-line quote-props
        '102': 'iconfont icon-danju',
        // eslint-disable-next-line quote-props
        '145': 'iconfont icon-baobiao'
      },
      // 默认不折叠
      isCollapse: false,
      // 激活的链接地址
      activePath: ''
    }
  },
  methods: {
    // 销毁本地token
    logout () {
      // 清空sessionStorage
      window.sessionStorage.clear()
      // 重新跳转
      this.$router.push('/login')
    },
    // 获取所有的菜单数据
    async getMenuList () {
      // 结构赋值
      const { data: res } = await this.$http.get('menus')
      if (res.meta.status !== 200) {
        return this.$message.error(res.meta.msg)
      }
      this.menulist = res.data
    },
    // 菜单的折叠与展开
    togglecollapse () {
      this.isCollapse = !this.isCollapse
    },
    backHome () {
      this.$router.push('/home')
    },
    // 保存链接的激活状态
    saveNavState (activePath) {
      window.sessionStorage.setItem('activePath', activePath)
      this.activePath = activePath
    }
  }
}
</script>

<style lang="scss" scoped>
img{
  height: 50px;
  width: 50px;
}
.home-container{
  height:100%;
}
.el-header{
  background-color: #373D41;
  display: flex;
  justify-content: space-between;
  // 去除左边框
  padding-left: 0;
  align-items: center;
  color: #fff;
  font-size: 25px;
  > div{
     display: flex;
     align-items: center;
     span{
       margin-left: 15px;
     }
  }
}
.toggle_button {
  background-color: #4A5064;
  font-size: 10px;
  line-height: 24px;
  color: #fff;
  text-align: center;
  letter-spacing: 0.2em;
  cursor: pointer;
}
.el-aside {
   background-color: #333744;
   .el-menu{
     border-right: none;
   }
}
.el-main {
   background-color: #eaedf1;
}
.iconfont {
  margin-right: 10px;
}
</style>
